store volume size in bytes in configmap
store volume size in bytes in configmap

during volume creation we check volume size in
bytes, and even during listing of volumes and
snapshots we need to check size in bytes

Signed-off-by: Madhu Rajanna <60fbf37a92c2a0908e31296d18dadbec5a4dae17@gmail.com>

ceph/ceph-csi,ceph/ceph-csi,ceph/ceph-csi,ceph/ceph-csi